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A war crime is a violation of the laws of war that gives rise to individual responsibility for actions by combatants in action, such as intentionally killing civilians or intentionally killing prisoners of war, , taking , unnecessarily destroying civilian , deception by , wartime sexual violence, , and for any individual that is part of the command structure who orders any attempt to committing (including or ), the granting of despite surrender, the conscription of children in the military, and flouting the legal distinctions of proportionality and military necessity.

(2025). 9780199694921, Oxford University Press. .

The formal concept of war crimes emerged from countries fighting and the codification of the customary international law that applied to warfare between , such as the (1863) of the Union Army in the American Civil War and the Hague Conventions of 1899 and 1907 for international war. In the aftermath of the Second World War, the war-crime trials of the leaders of the established the Nuremberg principles of law, such as that international criminal law defines what is a war crime. In 1899, the Geneva Conventions legally defined new war crimes and established that states could exercise universal jurisdiction over war criminals. In the late 20th century and early 21st century, international courts extrapolated and defined additional categories of war crimes applicable to a .


History

Early examples
In 1474, the first trial for a war crime was that of Peter von Hagenbach, realised by an tribunal of the Holy Roman Empire, for his command responsibility for the actions of his soldiers, because "he, as a knight, was deemed to have a duty to prevent" criminal behaviour by a military force. Despite having argued that he had obeyed , von Hagenbach was convicted, condemned to death, and beheaded. The evolution of individual criminal responsibility under international law By Edoardo Greppi, Associate Professor of International Law at the of Turin, Italy, International Committee of the Red Cross No. 835, pp. 531–553, 30 October 1999. highlights the first international war crimes tribunal by Linda Grant, Harvard Law Bulletin.


Hague Conventions
The Hague Conventions were international treaties negotiated at the First and Second Peace Conferences at , Netherlands, in 1899 and 1907, respectively, and were, along with the Geneva Conventions, among the first formal statements of the laws of war and war crimes in the nascent body of secular international law.


Lieber Code
The Lieber Code was written early in the American Civil War and President issued as General Order 100 on April 24, 1863, just months after the military at Mankato, Minnesota. General Order 100, Instructions for the Government of the Armies of the United States in the Field (Lieber Code) was written by , a German , political , and veteran of the . Lincoln made the Code for all wartime conduct of the . It defined command responsibility for war crimes and crimes against humanity as well as stated the military responsibilities of the Union soldier fighting the Confederate States of America.


Geneva Conventions
The Geneva Conventions are four related treaties adopted and continuously expanded from 1864 to 1949 that represent a legal basis and framework for the conduct of war under international law. Every single member state of the United Nations has currently ratified the conventions, which are universally accepted as customary international law, applicable to every situation of armed conflict in the world. The Additional Protocols to the Geneva Conventions adopted in 1977 containing the most pertinent, detailed and comprehensive protections of international humanitarian law for persons and objects in modern warfare are still not ratified by several states continuously engaged in armed conflicts, namely the United States, Israel, India, Pakistan, Iraq, Iran, and others. Accordingly, states retain different codes and values about wartime conduct. Some signatories have routinely violated the Geneva Conventions in a way that either uses the ambiguities of law or political maneuvering to sidestep the laws' formalities and principles.

The first three conventions have been revised and expanded, with the fourth one added in 1949:

  • The First Geneva Convention for the Amelioration of the Condition of the Wounded and Sick in Armed Forces in the Field was adopted in 1864 and then significantly revised and replaced by the 1906 version, the 1929 version, and later the Fourth Geneva Convention of 1949.
  • The Second Geneva Convention for the Amelioration of the Condition of Wounded, Sick and Shipwrecked Members of Armed Forces at Sea was adopted in 1906
    (2025). 9780415341516, . .
    and then significantly revised and replaced by the Fourth Geneva Convention of 1949.
  • The Third Geneva Convention relative to the Treatment of Prisoners of War was adopted in 1929 and then significantly revised and replaced by the Fourth Geneva Convention of 1949.
  • The Fourth Geneva Convention relative to the Protection of Civilian Persons in Time of War was first adopted in 1949, based on parts of the 1907 Hague Convention IV.
Two Additional Protocols were adopted in 1977 with the third one added in 2005, completing and updating the Geneva Conventions:
  • (1977) relating to the Protection of Victims of International Armed Conflicts.
  • (1977) relating to the Protection of Victims of Non-International Armed Conflicts.
  • (2005) relating to the Adoption of an Additional Distinctive Emblem.


Leipzig trials
Just after WWI, world governments started to try and systematically create a code for how war crimes would be defined. Their first outline of a law was " Instructions for the Government of Armies of the United States in the Field"—also known as the "Lieber Code." A small number of German military personnel of the First World War were tried in 1921 by the German Supreme Court for alleged war crimes.


London Charter/Nuremberg trials 1945
The modern concept of war crime was further developed under the auspices of the based on the definition in the London Charter that was published on August 8, 1945 (see Nuremberg principles). Along with war crimes the charter also defined crimes against peace and crimes against humanity, which are often committed during wars and in concert with war crimes.


International Military Tribunal for the Far East 1946
Also known as the Tokyo Trial, the Tokyo War Crimes Tribunal or simply as the Tribunal, it was convened on May 3, 1946, to try the leaders of the Empire of Japan for three types of crimes: "Class A" (crimes against peace), "Class B" (war crimes), and "Class C" (crimes against humanity), committed during World War II.


Formation of the International Criminal Court
On July 1, 2002, the International Criminal Court (ICC), a treaty-based court located in , came into being for the prosecution of war crimes committed on or after that date. Several nations, most notably the United States, China, Russia, and Israel, have criticized the court. The United States still participates as an observer. Article 12 of the provides jurisdiction over the citizens of non-contracting states if they are accused of committing crimes in the territory of one of the state parties.

The ICC only has jurisdiction over these crimes when they are "part of a plan or policy or as part of a large-scale commission of such crimes".


Prominent indictees

Heads of state and government
To date, the present and former heads of state and heads of government that have been charged with war crimes include:
  • President , for his contribution in the illegal abduction of children from and deportation into Russia during the Russian invasion of Ukraine.
  • Israeli Prime Minister Benjamin Netanyahu has been accused of war crimes in the including starvation. Both he and his former Defense Minister have been said to use "starvation as a method of warfare." Netanyahu responded that "There is no more just war than the one Israel is fighting in since October 7, 2023."
  • the head of Hamas' armed wing for the October 7th Attacks on Israel, was charged with war crimes for , , , and for taking . The warrants were issued unanimously.
  • German Großadmiral and President Karl Dönitz and Japanese Prime Ministers and Generals Hideki Tōjō and in the aftermath of World War II.
  • Former Serbian President Slobodan Milošević was brought to trial charged with genocide, crimes against humanity, and war crimes in three republics. This pertained to superior command responsibility for the Bosnia and Croatia indictments, and individual responsibility for the Kosovo indictment. His legal motion to be acquitted was denied in 2004, and he died in custody in 2006, before the trial ended.
  • Former Liberian President Charles G. Taylor was also brought to The Hague charged with war crimes; his trial stretched from 2007 to March 2011. He was convicted in April 2012 of aiding and abetting crimes against humanity.
  • Former Bosnian Serb President Radovan Karadžić was arrested in Belgrade on July 18, 2008, and brought before Belgrade's War Crimes Court a few days later. He was extradited to the Netherlands, and is currently in The Hague, in the custody of the International Criminal Tribunal for the former Yugoslavia. The trial began in 2010. On March 24, 2016, he was found guilty of in , war crimes and crimes against humanity, 10 of the 11 charges in total, and sentenced to 40 years' imprisonment. He was sentenced to life on appeal.
  • , former head of state of , is charged with three counts of genocide, crimes against humanity and other war crimes regarding the war in the Darfur region of Sudan.
  • Former leader was indicted for allegedly ordering the killings of protesters and civilians and crimes against humanity, during the 2011 Libyan civil war, and was killed in October 2011 before he could stand trial.
  • Former President was charged with several counts of human rights violations committed by his government and during his regime.Emery, Alex. Peru's Fujimori Found Guilty on Human Rights Charges, Bloomberg News, 7 April 2009. Accessed 7 April 2009. Fujimori declared guilty of human rights abuses (Spanish).


Other
  • Yoshijirō Umezu, general of the Imperial Japanese Army
  • , general of the Imperial Japanese Army who was known for his involvement in the
  • Seishirō Itagaki, War minister of the Empire of Japan
  • Hermann Göring, Commander in Chief of the .
  • Ernst Kaltenbrunner and , high-ranking members of the SS.
  • , Generalfeldmarschall, head of the Oberkommando der Wehrmacht.
  • , Großadmiral, Commander in Chief of the .
  • , Minister of Armaments and War Production in 1942–45.
  • , former U.S. Army officer found guilty of murder for his role in the My Lai massacre.
  • , aka "Butcher of Bengal" was a notorious Pakistan Army General known for his war crimes in Bangladesh during the Indo-Pakistani War of 1971.
  • Ali Hassan Abd al-Majid al-Tikriti, more commonly known by his nickname "Chemical Ali", executed by post-Ba'athist Iraq for his leadership of the gassing of villages during the Iran-Iraq War; also governor of illegally occupied during the
  • Ratko Mladić, indicted for amongst other violations of humanitarian law during the ; he was captured in Serbia in May 2011 and was extradited to face trial in The Hague, wherein he was found guilty and sentenced to life in prison.
  • , leader of the Lord's Resistance Army, guerrilla group which used to operate in Uganda.


Definition
War crimes are serious violations of the rules of customary and treaty law concerning international humanitarian law, criminal offenses for which there is individual responsibility.
(2025). 9780521899291, Cambridge University Press. .

Colloquial definitions of war crime include violations of established protections of the laws of war, but also include failures to adhere to norms of procedure and rules of battle, such as attacking those displaying a peaceful flag of truce, or using that same flag as a ruse to mount an attack on enemy troops. The use of and in warfare are also prohibited by numerous chemical arms control agreements and the Biological Weapons Convention. Wearing enemy uniforms or civilian clothes to infiltrate enemy lines for or missions is a legitimate ruse of war, though fighting in or individuals behind enemy lines while so disguised is not, as it constitutes unlawful .

(2025). 9780312362720, St. Martin's Press.
(2025). 9780380809394, Avon. .
Attacking is not a war crime. Protocol I, Article 42 of the Geneva Conventions explicitly forbids attacking parachutists who eject from disabled aircraft and surrendering parachutists once landed. Protocol Additional to the Geneva Conventions of August 12, 1949, and relating to the Protection of Victims of International Armed Conflict, International Committee of the Red Cross, Geneva, Switzerland. (Protocol I) Article 30 of the 1907 Hague Convention IV – The Laws and Customs of War on Land explicitly forbids to punish enemy spies without previous .

The rule of war, also known as the Law of Armed Conflict, permits belligerents to engage in combat. A war crime occurs when superfluous injury or unnecessary suffering is inflicted upon an enemy.

War crimes also include such acts as mistreatment of prisoners of war or . War crimes are sometimes part of instances of and though these crimes are more broadly covered under international humanitarian law described as crimes against humanity. In 2008, the U.N. Security Council adopted Resolution 1820, which noted that "rape and other forms of sexual violence can constitute war crimes, crimes against humanity or a constitutive act with respect to genocide"; see also wartime sexual violence. In 2016, the International Criminal Court convicted someone of sexual violence for the first time; specifically, they added rape to a war crimes conviction of Congo Vice President Jean-Pierre Bemba Gombo.

War crimes also included deliberate attacks on and of neutral states, such as the Japanese attack on Pearl Harbor. As the attack on Pearl Harbor happened while the U.S. and Japan were at peace and without a just cause for self-defense, the attack was declared by the to go beyond justification of military necessity and therefore constituted a war crime.

(2006). 9789004152762, Martinus Nijhoff Publishers.

War crimes are significant in international humanitarian law because it is an area where international tribunals such as the and Tokyo Trials have been convened. Recent examples are the International Criminal Tribunal for the Former Yugoslavia and the International Criminal Tribunal for Rwanda, which were established by the UN Security Council acting under Chapter VIII of the UN Charter.

Under the Nuremberg Principles, war crimes are different from crimes against peace. Crimes against peace include planning, preparing, initiating, or waging a war of aggression, or a war in violation of international treaties, agreements, or assurances. Because the definition of a state of "war" may be debated, the term "war crime" itself has seen different usage under different systems of international and military law. It has some degree of application outside of what some may consider being a state of "war", but in areas where conflicts persist enough to constitute social instability.

The legalities of war have sometimes been accused of containing favoritism toward the winners ("Victor's justice"),

(2009). 9781844673179, Verso. .
as some controversies have not been ruled as war crimes. Some examples include the Allies' destruction of cities during World War II, such as the firebombing of Dresden, the Operation Meetinghouse raid on Tokyo (the most destructive single bombing raid in history), and the atomic bombings of Hiroshima and Nagasaki. In regard to the strategic bombing during World War II, there was no international treaty or instrument protecting a civilian population specifically from attack by aircraft, therefore the aerial attacks on civilians were not officially war crimes. The Allies at the trials in and never prosecuted the Germans, including commander-in-chief Hermann Göring, for the bombing raids on Warsaw, , and British cities during as well as the indiscriminate attacks on Allied cities with V-1 flying bombs and V-2 rockets, nor the Japanese for the aerial attacks on crowded Chinese cities.
(2025). 9781845458447, .

Controversy arose when the Allies re-designated German (under the protection of the 1929 Geneva Convention on Prisoners of War) as Disarmed Enemy Forces (allegedly unprotected by the 1929 Geneva Convention on Prisoners of War), many of which were then used for such as clearing .S. P. MacKenzie "The Treatment of Prisoners of War in World War II" The Journal of Modern History, Vol. 66, No. 3. (Sep. 1994), pp. 487–520. By December 1945, six months after the war had ended, it was estimated by French authorities that 2,000 German prisoners were still being killed or maimed each month in mine-clearing accidents. The wording of the 1949 Third Geneva Convention was intentionally altered from that of the 1929 convention so that soldiers who "fall into the power" following surrender or mass capitulation of an enemy are now protected as well as those taken prisoner in the course of fighting.ICRC Commentaries on the Convention (III) relative to the Treatment of Prisoners of War Article 5 "One category of military personnel which was refused the advantages of the Convention in the course of the Second World War comprised German and Japanese troops who fell into enemy hands on the capitulation of their countries in 1945 (6). The German capitulation was both political, involving the dissolution of the Government, and military, whereas the Japanese capitulation was the only military. Moreover, the situation was different since Germany was a party to the 1929 Convention and Japan was not. Nevertheless, the German and Japanese troops were considered as surrendered enemy personnel and were deprived of the protection provided by the 1929 Convention relative to the Treatment of Prisoners of War."ICRC Commentaries on the Convention (III) relative to the Treatment of Prisoners of War Article 5 "Under the present provision, the Convention applies to persons who "fall into the power" of the enemy. This term is also used in the opening sentence of Article 4, replacing the expression "captured" which was used in the 1929 Convention (Article 1). It indicates clearly that the treatment laid down by the Convention applies not only to military personnel taken prisoner in the course of fighting but also to those who fall into the hands of the adversary following surrender or mass capitulation."


United Nations
The defines war crimes as described in Article 8 of the , the treaty that established the International Criminal Court:
  1. Grave breaches of the Geneva Conventions of 12 August 1949, namely, any of the following acts against persons or property protected under the provisions of the relevant Geneva Convention:
  2. :
  3. Other serious violations of the laws and customs applicable in international armed conflict, within the established framework of international law...
  4. In the case of an armed conflict not of an international character, serious violations of article 3 common to the four Geneva Conventions of 12 August 1949...
  5. Other serious violations of the laws and customs applicable in armed conflicts not of an international character, within the established framework of international law...


Legality of civilian casualties
Under the law of armed conflict (LOAC), the death of non-combatants is not necessarily a violation; there are many things to take into account. Civilians cannot be made the object of an attack, but the death/injury of civilians while conducting an attack on a military objective are governed under principles such as of proportionality and military necessity and can be permissible. Military necessity "permits the destruction of life of ... persons whose destruction is incidentally unavoidable by the armed conflicts of the war; ... it does not permit the killing of innocent inhabitants for purposes of revenge or the satisfaction of a lust to kill. The destruction of property to be lawful must be imperatively demanded by the necessities of war."
(1997). 9781575882154, William S. Hein.

For example, conducting an operation on an ammunition depot or a terrorist training camp would not be prohibited because a farmer is plowing a field in the area; the farmer is not the object of attack and the operations would adhere to proportionality and military necessity. On the other hand, an extraordinary military advantage would be necessary to justify an operation posing risks of collateral death or injury to thousands of civilians. In "grayer" cases the legal question of whether the expected incidental harm is excessive may be very subjective. For this reason, States have chosen to apply a "clearly excessive" standard for determining whether a criminal violation has occurred.

When there is no justification for military action, such as civilians being made the object of attack, a proportionality analysis is unnecessary to conclude that the attack is unlawful.


International Criminal Tribunal for the former Yugoslavia
For aerial strikes, pilots generally have to rely on information supplied by external sources (headquarters, ground troops) that a specific position is in fact a military target. In the case of former , pilots hit a civilian object (the Chinese embassy in Belgrade) that was of no military significance, but the pilots had no idea of determining it aside from their orders. The committee ruled that "the aircrew involved in the attack should not be assigned any responsibility for the fact they were given the wrong target and that it is inappropriate to attempt to assign criminal responsibility for the incident to senior leaders because they were provided with wrong information by officials of another agency". The report also notes that "Much of the material submitted to the OTP consisted of reports that civilians had been killed, often inviting the conclusion to be drawn that crimes had therefore been committed. Collateral casualties to civilians and collateral damage to civilian objects can occur for a variety of reasons."


Rendulic Rule
The Rendulic Rule is a standard by which commanders are judged.

German General was charged for ordering extensive destruction of civilian buildings and lands while retreating from a suspected enemy attack in what is called policy for the military purpose of denying the use of ground for the enemy. The German troops retreating from Finnish Lapland believed Finland would be occupied by Soviet troops and destroyed many settlements while retreating to Norway under the command of Rendulic. He overestimated the perceived risk but argued that Hague IV authorized the destruction because it was necessary to war. He was acquitted of that charge.

Under the "Rendulic Rule" persons must assess the military necessity of an action based on the information available to them at that time; they cannot be judged based on information that subsequently comes to light.


See also

Country listings
  • Allied war crimes during World War II
  • Australian war crimes
  • Bangladesh genocide
  • Bihari persecution
  • British war crimes
  • Croatian war crimes
  • East Timor genocide
  • German war crimes
    • Consequences of Nazism
    • Myth of the clean Wehrmacht
    • War crimes of the Wehrmacht
  • International Military Tribunal for the Far East
  • ISIS war crime findings
  • Israeli war crimes
  • Italian war crimes
  • Japanese war crimes
  • Kashmir human rights abuses
  • Palestinian war crimes
  • Russian war crimes
  • Saudi Arabian-led intervention in Yemen
  • Serbian war crimes
  • Soviet war crimes
  • Turkish war crimes
  • United Arab Emirates war crimes
  • United States Senate Committee on the Philippines
  • United States war crimes
  • Vietnam War#War crimes


Legal issues
  • American Service-Members' Protection Act
  • Command responsibility
  • Law of war
  • Metropolitan Police War Crimes Unit
  • Rule of law
  • Rule of Law in Armed Conflicts Project (RULAC)
  • Special Court for Sierra Leone
  • The International Criminal Court and the 2003 invasion of Iraq
  • Universal jurisdiction
  • War Crimes Law (Belgium)
  • War Crimes Act 1991
  • War Crimes Act of 1996


Miscellaneous
  • Chronicles of Terror
  • Civilian internee
  • Crime of aggression
  • Doctors' Trial
  • Forensic archaeology
  • International Criminal Court investigations
  • List of denaturalized former citizens of the United States, including those citizens who were denaturalized for concealing their involvement in war crimes in order to obtain that country's citizenship
  • Mass atrocity crimes
  • Military use of children
  • Nazi human experimentation
  • NKVD prisoner massacres
  • Nuremberg Principles
  • Razakars (Pakistan)
  • Satellite Sentinel Project
  • Srebrenica massacre
  • State-sponsored terrorism
  • Transitional justice
  • Unlawful combatant
  • War and genocide
  • Wartime sexual violence
  • Winter Soldier Investigation


Further reading
  • (2025). 9780521876094, Cambridge University Press. .
  • (2025). 9780521542272, Cambridge University Press. .
  • Hagopian, Patrick (2013). American Immunity: War Crimes and the Limits of International Law. Amherst: University of Massachusetts Press.
  • (2025). 9780816080830, Facts on File. .
  • (2025). 9780521728140, Cambridge University Press. .
  • (2025). 9780521870887, Cambridge University Press. .


External links

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